【摘要】 目的　探讨MSCT对胃肠道间质瘤 (GIST)的诊断价值。方法　回顾性分析 13例经手术病理证实的GIST的平扫及增强CT表现。结果　GIST发生于小肠 8例 ,胃部 4例 ,肠系膜 1例。肿块向腔外生长者居多 ,多呈圆形或椭圆形。13例中 ,良性 5例 ,其中 4例直径小于 5cm ,密度多均匀 ,边界清 ,强化均匀 ;恶性 8例 ,其中 7例直径大于 5cm ,密度多不均匀 ,内部有单发或多发坏死 ,边界多不清 ,强化不均匀 ,4例出现转移。结论　GIST的CT表现没有特异性 ,但MSCT对其定位准确 ,对肿瘤良、恶性的判别及预后的估计有重要价值更多还原

【Abstract】 Objective To investigate the value of multi-slice CT (MSCT) in the diagnosis of gastrointestinal stromal tumors (GIST). Methods Both plain and enhanced CT findings in 13 cases with pathologically proved GIST were retrospectively analyzed. Results The locations of primary tumor in descending order of frequency were the small bowel ( n =8), stomach ( n =4), mesenterium ( n =1). Predominant extraluminal growth of tumors made a large proportion in our cases, which appeared mainly as round or oval in shape. Of 13 GIST, 5 were benign and 8 were malignant, the benign lesions were usually within 5 cm in size with well-defined margin and showed homogeneous enhancement ( n =4); while the malignant lesions were over 5 cm in size ( n =7) and were ill-defined ( n =6), combined with necrosis within the tumor and heterogeneous enhancement ( n =7). Metastases were seen in 4 of 8 malignant GIST. Conclusion No characteristic CT signs may be helpful for the diagnosis of GIST. However, CT can precisely localize GIST and is very helpful in differentiating benign from malignant GIST and determination of prognosis.更多还原